Indemnifications and Guarantees (Details) - Debt Guarantees	9 Months Ended
	Sep. 30, 2021
Material Wholly Owned Domestic Subsidiaries
Guarantees
Percent of capital stock pledged	100.00%
Material Wholly Owned First Tier Foreign Subsidiaries
Guarantees
Percent of capital stock pledged	65.00%
Material Wholly Owned Foreign Subsidiaries And Material Wholly Owned U S Domiciled Foreign Subsidiaries
Guarantees
Percent of capital stock pledged	100.00%